IBM N Series, Hardware Manual

Page: 129 / 368

Chapter 8. MetroCluster
109
򐂰 Mixed SATA and FC configurations are allowed if the following requirements are met:
– There is no intermixing of Fibre Channel and SATA shelves on the same loop.
– Mirrored shelves must be of the same type as their parents.
The Stretch MetroCluster heads can have a distance of up to 500 m (@2 Gbps). Greater
distances might be available at lower speeds (check with RPQ/SCORE). Qualified distances
are up to 500 m. If you have distances greater than 500 m, choose Fabric MetroCluster.
Table 8-2 lists theoretical Stretch MetroCluster distances.
Table 8-2 Theoretical MetroCluster distances in meters
8.3.2 Cabling Stretch MetroClusters
Figure 8-5 shows a Stretch MetroCluster with two EXN4000 FC shelves on each site.
Figure 8-5 Stretch MetroCluster cabling with EXN4000
Data Rate in Gbps OM-2 (50/125um) OM-3 (50/125um) OM-3+
1 500 860 1130
2 300 500 650
4 150 270 350
Remember: The following maximum distances are supported for Stretch MetroCluster:
򐂰 2 Gbps: 500 m
򐂰 4 Gbps: 270 m
򐂰 8 Gbps: 150 m